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74ACT138B Folha de dados(PDF) 5 Page - STMicroelectronics

Nome de Peças 74ACT138B
Descrição Electrónicos  3 TO 8 LINE DECODER (INVERTING)
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

74ACT138B Folha de dados(HTML) 5 Page - STMicroelectronics

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74ACT138
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CAPACITIVE CHARACTERISTICS
1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC/n (per circuit)
TEST CIRCUIT
CL = 50pF or equivalent (includes jig and probe capacitance)
RL = R1 = 500Ω or equivalent
RT = ZOUT of pulse generator (typically 50Ω)
WAVEFORM 1: PROPAGATION DELAYS FOR INVERTING OUTPUTS (f=1MHz; 50% duty cycle)
Symbol
Parameter
Test Condition
Value
Unit
VCC
(V)
TA = 25°C
-40 to 85°C
-55 to 125°C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
CIN
Input Capacitance
5.0
4
pF
CPD
Power Dissipation
Capacitance (note
1)
5.0
fIN = 10MHz
60
pF


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